3666761851 has 4 divisors (see below), whose sum is σ = 3667334104. Its totient is φ = 3666189600.

The previous prime is 3666761849. The next prime is 3666761881. The reversal of 3666761851 is 1581676663.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1581676663 = 7 ⋅225953809.

It is a cyclic number.

It is not a de Polignac number, because 3666761851 - 2¹ = 3666761849 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3666761795 and 3666761804.

It is not an unprimeable number, because it can be changed into a prime (3666761881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 276405 + ... + 289366.

It is an arithmetic number, because the mean of its divisors is an integer number (916833526).

Almost surely, 2^3666761851 is an apocalyptic number.

3666761851 is a deficient number, since it is larger than the sum of its proper divisors (572253).

3666761851 is an equidigital number, since it uses as much as digits as its factorization.

3666761851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572252.

The product of its digits is 1088640, while the sum is 49.

The square root of 3666761851 is about 60553.7930356142. The cubic root of 3666761851 is about 1542.0350129125.

The spelling of 3666761851 in words is "three billion, six hundred sixty-six million, seven hundred sixty-one thousand, eight hundred fifty-one".